Railway-car truck



G. A. BOYDEN, JR., AND J. C. BOYDEN.

RAILWAY CAR TRUCK. APPLICATION FILED Ame, 1920.

Patented June 1, 1920.

3 SHEETSSHEET 1- .lmmsl 5 and auoi e. A. BOYDEN, 1H,, AND J. c. BOYDEN.

RAILWAY CAR TRUCK. APPLICATION FILED APR. 6, 1920.

-1,341,'7 1, v PatentedJuile 1,1920.

36 3 SHEETS-SHEET 2- G. A BOYDEN, 1a., AND J. C. BOYDEN.

RAILWAY CAR TRUCK.

APPLICATION FILED APR. 6, I920.

1,3%1,781 Patented June 1, 1920.

3 SHEETS-SHEET 3 4 new and useful Improvements in Railway-' Car Trucks, (Case F;) and we do hereby ears GEORGE A. BOYDEN, JRQAND JOHN o. Bovnniv, or BALTIMORE, MARYLAND.

RAILWAY-CAR TRUCK.

Specification of Letters Patent.

Faten ted J une 1, 1920.

I Application filed April 6, '1920. Serial No. 371,664.

To all whom it may concern Be it known that we, GEORGE A. BoYonN, Jr., and JOHN C. BoYDnN, citizens of the United States, residing at Baltimore, in the State of Maryland, have invented certain declare the following to be a full, clear, and exact description of the invention, such as will enable others skilled in the art to which it appertains to make and use the same.

Our invention relates to railway car trucks.

Our application for U. S. Letters Patent for railway car trucks, Case A, which was filed May 22nd, 1919, and serially numbered 298953 involves a truck comprising members that act coordinately horizontally so that the wheels andjou'rnals will conform to the contour of the rails whatever it may be, and which, in addition, have disparate vertical actions.

Our application for U.'S. Letters Patent for railway car trucks, Case B, which was filed August 5th, 1919, andserially numbered 315427 involves a truck comprising members that act coordinately horizontally as in the truck shown in Case A, and which, in addition, have equalized vertical actions.

The present application is intended to cover a truck comprising members that act coordinately horizontally as in, the. truck shown in Cases A and B, and which, in addition, have equalized vertical actions as in the truck shown in Case B.

Among the objects of our invention are To simplify the various members of the truck. I

To produce a truck the members of whic can be assembled or separated without the use of tools. i

To produce a truck having a member which acts to coiirdinate the mutual angularityof the axles in a horizontal plane and at the same time serves to transmit the load stress to the members through springs.

To provide means for connecting the pilot and trailer bolsters to the central bolster so that the former may have horizontal and vertical freedom with reference to the latter.

One embodiment of our improved truck, is shown in the accompanying drawings, in which s Figure 1 is a plan View of the truck con structed in accordance with our invention.

Fig. 2 is a side vi wef the truck shown tion of the arrows.

in Fig. 1, said view being shown partly in section and the section being taken as along the line 2-2 in Fig. 1 looking in the direc, 1

Fig. 3 is a view of the coordinating plate taken as viewed in the direction of the arrow 3 in'Fig. 2.

Fig. tis a side view of either the pilot or trailer bolster.

'Fig. 5 is a View of the bolster shown in Fig. 4 looking in the direction of the arrow 5 in said figure.

Fig. 6 is a plan view of the central bolster.

Fig. 7 is a view of the bolster shown in Fig. Glooking in the direction of the arrow 7-in said figure.

Fig. 8 is a view of the bolster shown in Fig. 6 looking in the direction of the arrow rails, and a transverse movement or stress willl bethat in a direction transverse to the ra1 s. I

In the drawings a 15 represents the wheels, and'16, 17 and 18 represent, respectively, the pilot, central and traileraxles. The journals of the axles are mounted in any approved form of axle box such as 19, and the axles and wheels are of Master Car Builders construction.

Each pilot and trailer bolster consists of a pair of pedestals such as 20, each pedestal being provided with jaws 21 for the reception of the axle box 19 which fits snugly therein. The. pedestals 2020 of each end member are joined together by the frame 22 and said frame is provided with arms 23-23 terminating in the boss 24 having a hemispherical lower surface. The frame 22 is provided'with two spring bases 25-25 and with ears 26 for the support of brake shoes. The brake shoes forming no part of our present invention are not illustrated or described. The frame 22 is provided with a pair of rocker bearings 2727 each having end surfaces 29 and side surfaces 33-33.

The central bolster consists of a pair of pedestals such as 30-30, each pedestal being provided with jaws 31 .for the reception of the axle box 19 which fits snugly I invention are not illustrated or described.

The frame 32 is provided on each side with a pair of sockets 34--34 having hemi spherical bottoms. One of the bosses 24 is introduced in each of the sockets 34 and ,serves to connect the corresponding end member with the central member. The frame 32 is provided with six finished surfaces 36 on the inner surfaces thereof for a purpose hereinafter explained.

It' is to be noted that each end member is connected with the central member on the side of the latter adjacent to said end member. It is furthermore to be noted that by socket 34, each end member, in addition to reason of the shape of the boss 24 and the revolving in a horizontal plane around the .axis of said socket, can move angularly in vertical planes. Thus, the articulation of each end member with the central member is substantially a universal joint.

The coordinating plate 37 is provided with four bearings 35 the ends of which are curved as at 38. The bearings 35 extend within the rocker bearings 27 of, the pilot and trailer bolsters, the surfaces 38 being in contact with the end surfaces 29 of said rocker bearings. The bearings 35 rest upon the spring caps 40 and the latter rest upon the top of the springs 39. The caps 40 are provided with guides 41--41 which slide freely upon the side surfaces 33 of the rocker bearings 27-27. V

The king pin 42 is connected to the car body in any approved manner and any approved form of side bearings are secured upon said body to form a sliding bearing upon the truck side bearings 43. I

The coordinating plate 37 is provided with six gibs 44 finished on the outer surface thereof, which project downwardly and each has a sliding bearing upon one of the finished surfaces'36 of the frame 32, thus connecting ing plate 37 may have vertical and longitu the coordinating plate and the central bolster together in such a manner that while the former can have angular movements in a vertical plane and vertical and transverse movement with reference to the latter, yet the latter is forced to partake of the angular movement in a horizontal plane of the former.

Each of the bearings 35 of the coordinatdinal movements as well as angular movements within the corresponding rocker bearing 27. I

The truck members act coordinately horizontally according to the method set forth in Case A, with the exception that eachpilot and. trailer bolster; is joined by a ball and socket joint to the central bolster on the near side thereof. This construction has been adopted in the truck shown in the springs 39 and the ball and socket joints insure the utmost freedom .of the wheels in following the vertical contour of the rails.

As set forth, in Case A, the coordinating horizontal movements of the members provide for the utmost freedom of the wheels in following the horizontal contour of the rails.

Thus, the truck illustrated and described in this case provides for the minimization of the friction due to the vertical and transverse strcsses against the rails and thus insures a minimization of the longitudinal stress against the draw bar, which eventuates in a great reduction of operating costs.

We claim 1. In a six wheel truck for railway transportation, thebombination with three journal members, each end member being connected to the near side of the central memher by ball and socketjoint, whereby each end member moves only angularly about said joint.

2. In a six wheel truck, the combination with a bolster for each pair of journals, a coordinating plate engaging with the central bolster and with each of the pilot and trailer bolsters to control the mutual angularity of.

said journals, springs between said coordinatingplate and said pilot and trailer bolsters and a ball and socket joint between each of said pilot and trailer bolsters and said central bolster.

3. In a six wheel truck, the combination with a bolster for each pair of journals, a coordinating plate engaging with the central bolster and with each of the pilot and trailer bolsters to control the mutual angularity of said journals, springs mounted on said pilot and trailer bolsters and cap plates mounted on said springs, said cap plates having sliding connections with said pilot and trailer. bolsters and with said coordinating plate. 4. In a six wheel truck, the combination with a rigid structure subjected to the vertical load stress, of pilot, trailer and central bolsters articulated together, springs on said pilot and trailer bolsters, cap plates on said with a bolster for each "pair of journals, of a coordinating plate engaging with the central bolster, rocker bearings on the pilot and trailer bolsters comprising end surfaces, and bearings on said coordinating plate having curved surfaces to engage said end surfaces.

6. In a six Wheel truck, the combination with a bolster for each pair of journals, of a coordinating plate engaging with the central bolster, rocker bearings on the pilot and trailer bolsters comprising end and side surfaces, hearings on said coordinating plate having curved surfaces to engage said end surfaces, springs on said pilot and trailer bolsters and cap plates on said springs engagingsaid side surfaces and the bearings of said coordinating plate.

In testimony whereof, we affix our signatures.

EORGE A. BOYDEN, JR. J OHN G. BOYDEN. 

